Production of overseams



Jan. 4, 1927.

e. HUBER PRODUCTIQN OF OVERSEAMS File? Feb. 19, 1926 2 Sheets-Sheet '1 Jan. 4, 1927.

G. HUBER PRODUCTION OF 'ovERsEAus Filed Feb. 19' 1926 2 Sheets-Sheet 2 Patented Jan. 4, g 1927.

UNITED STATES PATENT oFEicE.

GUSTAV nonnn, or" s'ro'rrom'r, GERMANY.

rnonuorron or ovnasnam s.

Application filed February 19, 1926, Serial No. 89,278, and in Germany November 30, 1925.

My invention relates to the production of an overseam such as described in my application, Ser. No. 547093, filed on March 27, 1922, and the object of my present invention is to further improve the oversearn This I accomplish firstly in that I cause the overseam needle to stitch not only through the bent edges on both sides of theseam uniting two pieces of fabric, but to stitch also through the rib produced by said seam, and secondly in that, instead of one looper cooperating with the overseam needle, I use two loopers, each carrying a thread, which threads meet in the center overthe regular seam, where they are tied. In this'manner,

I produce an overseam which is more du r" able thanv the overseam described in my above said application and at the same time has a very attractive appearance.

For a full understanding of my invention, I-refer to the appended drawing, in'which I have illustrated the same and in which Fig. 1 is a side elevation showing the sewing to-i gether of two pieces of fabric, the trimming of the sewed together edges and the production of the overseam; Fig. 2 shows the finished seam and over'seam, as seen from the inside of the united pieces of fabric;-Fig. 3

shows the outside of the two sewed together and overseamed pieces of fabric, the overseam. being shown in section on the lefthand side of the figure, 4 is a crosssectional view showing the production of the overseam by the overseam needle, and

the two cooperating loopers; Fig. 5 is a perspective view 'of Fig. 1 showing the movable end of the curved arm containing the feedmechanism for the overseam-needle.

In the drawing, the two pieces of fabric 40 to be sewed together and overseamed are indicated at a and b. As they are fed toward the movable end it of the curved arm (not shown) they pass one above and the other below the"1oosely mounted pointed 45. member 0 of said arm (Fig. 5 under thepresser-foot .12 toward the sewing needle 6 which sews the two pieces of fabric a and I) together along theiredges. The projecting portions '0 of the united edges are then I trimmed off by the upper and lower coacting knives wand :v of the trimming device provided in close proximity to the needle 6 as clearly shown in Fig. 5, the mounted edges forming a rib f more clearly shown in Fig. 4. In this movable portion or of the curved arm is located the feeder g for' the overseam ,into a recess h provided in-the rounded arm adapted to cooperate with the feeder g. In this position of the rib f; the oversea'm needle stitches not merely through the bent edges of the two pieces of fabric a and b on both sides of the rib 7 but stitches also through this rib itself. as clearly shown in Fig. 4. Above and below the feeder 'g are provided-the curved arm abutments s and t whereby the stitching lines for the overseam needle as indicated at Z and m in Figs, 2 and 3 are determined, which stitching lines, according to the position of the abutments s and t may be varied.

At n, in Figs. 1, 4 and 5 is shown the one and at p the other looper cooperating with completed its forward movement having .passed through the loop-0' of the thread carried by the overseam needle is. While the looper n is at rest in this position, the looper 12 passes between the looper n and its overseam thread 1' carrying its own thread 9 to the overseam needle has the same is starting on its descent. The directionof this looper movement is shown by the arrow 1 in-Fig. 4. 8 As the looper p oscillates back,it'withdraws from the loop of the overseam thread 1', so that thread 0 comes to rest on thread gand by a proper regulation or equalization of a the thread tensions; the two threads 9 and r are tied in the center between thetwo stitch in'g lines Z and m, as clearly shown in Figs. 1, 2 and 5. At 3/ in Fig. l is shown the looper cooperating with the sewing needle e, which passes through the stitch-hole shown at z in Fig ,5. The length-of stitch of the overseam is greater thanthe length of stitch of the seam, such length being, preferably about twice the seam stitch lengtl I claim as my invention: 1. A seam for joining abutting edges of two pieces of fabric consisting of a series of thread loops, each thread loop entering and emerging from the same face of one of 0 the pieces of fabric at'one side of the abutting edges, then passing through both pieces of fabric and joining the same at their abut tingedges, and then entering and emerging from the same face of the other piece of fabric at the other side of the abutting edges and means looking said-thread loops,

2. A seam for joining abutting edges of two pieces of fabric consisting of a series of thread loops, each thread loop entering and emerging from the same face of one of the pieces of fabric at one side of the vand emerging from the same face of one of the pieces of fabric at one side of the abutting edges, then passing through both pieces of fabric and joining the same at then abutting edges, and then entering andemerging from the same face of the other piece of fabric at the other side of the abutting edges, and means locking said thread loops, said means comprising two over-edge threads interlocking above said abuttin edges.

4. In combination with a primary seam joining the abutting edges of two pieces of fabric, a secondary seam consisting of a series of thread loops, each thread loop entering and emerging from the same face of one of the pieces of fabric at one side of the abutting edges, then passing through both pieces of fabric and joining the same at their abutting edges, and then entering and emerging from the same face of the other pieceof fabric at the other side of the abutting edges, and means locking said thread loops.

5. In combination with a primary seam joining the abutting edges of two pieces of fabric, a secondary seam consisting of a series of thread loops, each thread loop entering and emerging from the same face of one of the pieces of fabric at one side of the abutting edges, and then passing through both pieces offabric and joining the same at their abutting edges, and then entering and emerging from the same face of the other piece of fabric at the other side of the abutting edges, and means locking said thread l0ops, said means comprising an ever-edge thread. 6. In combination with a primary seam joinmg the abutting edges of two pieces of fabric, a secondary seam consisting of a,

series of thread loops, each thread loop entering and emerging from the same face of one of the pieces of fabricatone side of the abutting edges, then passing through both pieces of fabric and joining the same at their abutting edges, and then entering and emerging from the same face of the abutting edges, and means locking said thread loops, said means comprising two over-edge threads interlocking above said abutting edges.

7; In combination with a primary seam joining the abutting-edges of two pieces of fabric, a secondary seam consisting of a series .of thread loops, each thread loop entering and emerging from the same face of one of the pieces of fabric at one side of the abutting edges, then passing through both pieces of fabric and joining th same at their abutting edges, and then er tering and emerging from the same face of the other piece of fabric at the other side of the abutting edges, the stitches of said secondary seam being of greater length than the stitches of said primary seam, and means locking said thread loops. o

8. In combination with a primary seam joining the abutting edges of two pieces of fabric, a secondary seam consisting of a series of thread loops, each thread loop entering and emergingfrom the same face of one of the pieces of fabric at one side of the abutting edges, and entering and emerging from the same face of the other piece of fabric at the other side of the abutting'edges, the stitches of said secondary seam being of greater length. than the ,stitches of said prunary seam, and means locking the said thread loops, comprising two over-edge threads interlocking above said abutting edges.

9. The process of joining two pieces of fabric having abuttin edges comprising passing thread loops into and out of the same ace "of one piece of fabric, then through the two edges, then into and out of the same face of the other and locking the loops.

10. The process of joining two pieces of fabric comprising forming a primary seam through their abutting edges, then forming a secondary seam covering said primary through their abutting edges, then forming a secondary seam covering said primary 125 seam bypassing thread loops into and out of the same face of one piece of fabric, then thrglough the two abutting edges, then into an out piece of fabric,

and out of the same face of t e other piece H 65 of the same face of'the other piece I of fabric, the length of the secondary seam other piece of fabric at the other side of the stitches being greater than the length of the edges thereof on both sides of the seam, and primary stitches, and locking the loops. finally stitching through said bent over 13. The method of producing a combined edges and said united edges with a thread 10 seam and overseam in one operation which covering the first seam.

I 5 consists in first uniting the edges of two In testimony whereof I atfix'lny signature.

' pieces of fabric by a seam, then spreading the united pieces of fabric and forming bent GUSTAV HUBER. 

